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Free diaphragm analysis calculator
- Free · No sign-up required
- Instant results
- FEA-powered
No credit card required · 200+ calculators · All major codes
Calculate max shear in flexible diaphragms and loads to shear walls under wind or seismic loading.
How to use the free diaphragm analysis calculator
No credit card required.
- [ 01 ]
Define diaphragm geometry
Enter the diaphragm dimensions and the X-positions of each braced wall line from the left edge.
- [ 02 ]
Apply lateral loads
Enter wind or seismic load as a uniform pressure (kip/ft) or total force applied to the diaphragm.
- [ 03 ]
Review results
Read the maximum diaphragm shear and the reaction force delivered to each braced wall line.
About this calculator
Perform fast analysis of simple flexible diaphragms using the Calcs.com Diaphragm Analysis Calculator. With support for unlimited loads and supports, plus highly accurate FEA based results for load distribution and in-plane shear, the Calcs.com Diaphragm Analysis Calculator is the fastest way to model and design diaphragms.
Last reviewed
Inside the calculator
How to use the free diaphragm analysis calculator
The Diaphragm Analysis allows users to quickly analyze diaphragms in a few simple steps. Currently only flexible diaphragms are supported; forces are distributed to vertical resisting elements by tributary area and simple beam analysis (e.g. wood-sheathed diaphragms).
Signing up unlocks advanced diaphragm design and linking to wind and seismic analysis. The sheet has Key Properties (geometry, braced wall line positions), Loads (wind/seismic), and Summary (outputs and diagrams).
Frequently asked questions
Get more functionality with a free Calcs.com trial
Start a 14-day free trialThis calculator is free. A 14-day trial links the diaphragm to the load and wall calculators around it:
- Wind loads to ASCE 7
- Seismic analysis to ASCE 7
- Wood and masonry shear wall design
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